Wrapping machine



; Feb. 19, 1929. K. F. KRQNQVIST WRAPPING MACHINE Fild April 10, 1925 4 Sheets-Sheet Tmm G q 0 m M E hi? 0 0 o 0 Q HEM 0 NJ Q. 7

Feb. 19, 1929.

K. F. KRONQVIST WRAPPING VIACHINE Filed April 10, 1925 4 Sheets-Sheet 2 Feb. '19, 1929.

'K. F. KRONQVIST WRAPPING MACHINE Filed April 10, 1925 4 Sheets-Sheet 3 Feb. 19, 1929. 1,703,043

K. F. KRONQVIST WRAPPING momma 4 Sheets-Sheet 4 Filed April 10, 1925 5 may 59% Patented Feb. 19, 1929.

UNITED STATES 1,103,043 PATENT OFFICE.

KARL FRITTIOF KRONQVIST, OF HELSINKI, FINLAND.

WRAPPING MACHINE.

Application filed April 10, 1925, Serial No. 22,139, and in Finland April 2, 1924.

This invention relates to wrapping machines and more particularly to automatic machinesfor covering articles in the nature of sweetmeats, soaps, withwrapper' and label. The machines used for thepurpose heretofore do the work unsatisfactorily as a result of being constructed for a definite size of the objects to be wrapped. Themachines constructed for manufacture of sweet meats, etc, do not, however, deliver the manufactured articles of, an equal size, thus necessitating wrapping of same by hand. This obstacle is overcome by the machine invent-ed by me. My machine does the wrapping perfectly even in case the articles vary in size up to 20%.

The attached drawings show a machine for carrying out the idea of the invention in question.

Fig. 1 shows the wrapping machine in side elevation.

Fig. 2 shows the machine as seen from opposite side and some driving mechanisms.

Fig. 8 is an enlarged detail View of the sweetmeat grasping mechanismr Fig. 4 is a plan view of the paper cutting mechanism.

Fig. 5 is sectional view of the wrapper transporting wheel.

Fig. 6 is a detail view of the paper and wrapper gripper.

Fig. 7 is a plan view of the said gripper.

Fig. 8 is a detail view of the wrapper folding mechanism.

Fig. 9 is afurther detail view of a wrapper folding mechanism.

Fig. 10 is a sectional view taken on line AB of Fig. 1. r

Fig. 11 isanother sectional view along line C-D of Fig. 9.

Figs. 12 and 13 show in plan and side view a form of sweetmeat suitable for wrapping with the machine. v

Figs. 14 to 17 show different stages of the wrapping process.

The machine does its work automatically; the wrapping being effected in different stages as the sweetmeats are fed through devices of which each one does a part of the work. The sweetmeats areone at a timeby means of suitable feeding mechanism brought to a place a (Fig. 1). A transporting wheel moves the sweetmeat to another place Z), to be caught there by a grip per on an intermediate wheel and delivered at place 0, where the Wrapper and label papers, cut in a separate shearing device, are pressed against the sweetmeat which sticks to the intermediate wheel. sweetmeat moves further to a place (I, where it is caught by the gripper of the wrapping wheel, in such a way, that the wrapper and label come under the sweetmeat, the papers thus covering the opposite edges of the sweet meat. The rotation of the wrapping wheel brings the sweetmeat further to a place 0, where a folder folds one side of the paper against the sweetmeat. When the wheel rotates further on, a belt running over the wheel folds the other side of the paper over the sweetmeat, which thus takes the appearance shown on Fig. 14. The overhanging ends of the wrapper are in position f struck in by two tongues working at an angle to each other (as shown in Fig. 8,,on which the sweetmeat and wrapper are shown dotted). When the tongues are withdrawn, the tipsof the sweetmeat wrapper are struck in. by angle plates. The sweetmeat moves further, the wrapped ends gliding between springing and twisted folding plates and twisted segments pressing the ends together and straightening them out (Fig. 11, on which the 'sweetmeat is indicated in dotted lines). When the wrapping is thus completed, the sweetmeat is tossed out in position 9 by a slide.

The sweetmeats are conveyed to a position shown by the arrow a, against the plate 4 by any suitable means, butmore specially by the feeding device described in the copending application No. 22,140, filed April 10, 1925. A carrier wheel 5, the sole function of which is to transport the sweetme-ats from position a to position b, is furnished with pins 6 in pairs, these pins transferring the sweetmeats to position b when the wheel rotates in the direction indicated by arrow 7. I have filed a separate application for the transporting device (Ser. No. 22,140, filed April 10, 1925), the intermediate wheel with auxiliary devices being explained by Figure 2' on the accompanying drawing. The sweetmeats are in the position I) caught by one of the six gripperslO on an intermediate wheel 9 and are thus moved further in the direction of the arrow 11. The gripper 10 (Figs. 1 and 3) is at two points attached to a slide 12 moving radially on the intermediate Wheel. 9, at one point-by means of a pin 13, on which the gripper arms 14 swivel, at the other point by means of a bracket 15,

The

in which the stem of the gripper may move back and forth. The slide is furnished with a roller 17 engaged by a cam 18, which roller guides the motion of the slide and works together with a spring 20, which is at one end attached to the intermediate wheel, and at the other end to a pin 19 on the slide. The

stem of the gripper is furnished with a roller 21, moving on the periphery of a cam 22, and cooperating with a. spring 23, thus governing the opening and closing of the gripper.- When approaching the position b the slide, along with the gripper, are gradually lowered by the cam 18. At the same time, the cam 22 will open the j aws of the gripper, due to the pa-ntagraph action of the levers 10, against the action of the spring 23, which tends to close the said. jaws. (See Fig. When the wheel 9 has reached the position 7) the cam 18 has lowered the slide to its eX- treme position and the cam 22 opened the jaws of the gripper, upon further rotation the cam 22 will release the roller 21, whereupon the spring will close the jaws and grasp the sweetmeat, (see Fig. 1) pressing it against a rubber cushion 24 on the slide. A gripper constructed in the described way will automatically centre the sweetmeat, and make an allowance in the size of the sweetmeat possible.

W'hen't-he slide 12 reaches the position in dicated by c, it is together with the gripper pushed inward. The wrapper and label are pressed on the sweetmeat. The wrapper which comes from areel 25 over guiding rollers 26 and 27 (Figs. 1 and 4) is by means of a friction roller 29, which is mounted on a shaft 28 and is pressed against an idler 30, brought to a shearing device, consisting of a sharp edged plate 32 and a slide 35, sharpened at the edge 34, the slide being guided in slots in the frames of the counter-plate. The motion of the shaft 28 is made clear as the description proceeds. The slide 35 gets its mot-ion from a shaft 36 by means of an arm 3'7. The shaft is at one end furnished with a double lever 38. One end of this lever carries a glidingroller 39, moving on the periphery of a wheel 40 attached to the shaft 28, the motion of which is made clear as the specification proceeds. The periphery is formed with a recess 41, the depth of which corresponds to the radius of the gliding roller, which thus sinks into the notch under the rotation of the wheel 40 on account of the action of the spring 42 attached to the other arm of the double lever. The paper moves between the two sharp edges 31 and 34, thus being cut into definite slips. The clipping of the paper is thus effected in a moment, so that the paper can not curl, but is fed along evenly reaching the position 0 by its own velocity. The diameter of the roller 29 on the shaft 28 is selected to correspond to the speed wanted to feed the wrapper, and the diameter of the wheel 40 on the same shaft is selected so as to cut the paper by the shearing device 32, 34 at a predeterminedposition.

The labels lie in a. stack 011 a platform member 32 and are supported by pins 44. The member 43 moves back and forth on a guide 45, which is attached to the vertical frame 52 of the bench. The motion is transmitted to the platform from a shaft 46 on which a cam 47 is keyed acting upon a lever 48, which is mounted on the bench l and furnished with a gliding roller 49, which roller follows the periphery of the cam 47. The lever 48 is connected to the platform by means of a pull rod 50. The labels are taken out from the stack by means of a transporting device 55, which works on the vacuum principle and is attached toa rotating shaft 54 (Figs. 1 and The vacuum eifect conducted through a hole 56 in the shaft to a duct 57, from which it is conducted to the suction holes 60 through valves 58, which are opened when they strike the tip 59 of a plate, attached to the frame 5 When the valve has passed the tip, the valve stem is released and the valve closed by means of a spring 61. The valve cone is furnished with leakage holes 62, which trans plant the suction effect. The transporting device rotates in the direction indicated by arrow 63. At the moment when the transporting devicegrips a label from the platform 43, the device and the platform have a parallel direction of motion, but the veloeity of the platform is greater. At the moment when the transporting device brings the label into position 0, the wrapper is there already. Both papers will thus come onto the sweetmeat, and a gripper mounted on the intermediate wheel 9, presses one end of the papers against the periphery of the wheel. The gripper (Figs. 1, 6, 7) consists of a roller 65, mounted on a shaft 64 journalled within the intermediate wheel, the roller protruding from the slot in the periphery. The roller is furnished with claws 66. The shaft of the roller is furnished with an arm 67, one end of which is supplied wit-h a gliding roller 68. A spring 69, one end of which is attached to the intermediate wheel, the other end being attached to an extension of the arm 67, has a tendency to turn the arm thus pressing the claws 66 against the periphery of the intermediate wheel. To the frame 52 is attached a segment 70. When the gripper passes the segment, the gliding roller rolls upon the upper surface of the segment, the arm 67 turns the shaft 64 and the claws are lifted up from the periphery. This takes place just before the position 0 is reached. The lining and. label papers are pushed under the claws 66 at c, the gliding roller 68 leaves the segn' ent, the spring turns the shaft 64 by means of the release the sweetmeat. When a segment 71,.

attached to the frame 52 comes under the gliding roller 68, the arms 66 of the gripper are lifted up and the papers are thus released. caught by one of the ten grippers 73 on the wrapping wheel proper in such a way, that the papers are pushed against a stop 74 on the slide of the gripper.

The wrapping wheel consists of a plate disc, the periphery of which is bent at right angles in order to make the peripherical surface wider. This wide periphery is furnished with a notch adjacent to the gripper in order to make the function of the gripper possible.

The gripper 73 works by means of a cam 75 and a spring 76 in the same way as the gripper 10 of the intermediate wheel. The gripper 73 (Figs. 1 and 10) is not, however, attached to a moving slide like the gripper 10, but at corresponding places fitted directly on the wrapping wheel by means of pins. The middle portion of the slide 77 is furnished with a slot 78. The pins, which hold the gripper onto the wrapping wheel 72 and are in the slot 78, allow the slide to move in radial direction with respect to the wheel. A spring 79 pulls the slide and along with it the stop 74 outward.

When the transfer takes place, the gripper 10 pushes the sweetmeat against the slide, pushing the slide 73 with its support 74 backwards, at the same time energizing the spring 79. The gripper 73, which has remained open, is now closed. The gripper 73 is self-centering, thus making an allowance in the size of the sweetmeat possible. The wrapping wheel has an intermittent motion in the direction indicated by arrow 80; the speed of it at the moment of the transfer is the same as that of the intermediate wheel.

A folder 81 turns in position 6 one side of the papers against the sweetmeat. The folder consists of an angle-lever, mounted at its fulcrum on a shaft 82. One end of the lever is furnished with a convex plate 83, the other end carrying a pin 84, engaged by the forked end of an arm attached to a shaft 85. The shaft 85 gets its motion from a cam 86 by means of an arm 87, which is attached to the shaft, and a gliding roller 88 on the arm. A spring 89 presses the roller against the cam. In the position 6, the other sideof the papers is folded over the first folded one, the sweetmeat coming when the wheel The sweetmeat is at this moment 72 rotates further, under a belt 91 resting upon pins 90, which are attached to the frame 52.

The papers, protruding beyond. the ends of the sweetmeat, are in the position f struck in. This is effected by crossing tongues 92 (Figs. 1 and 8) at angles to each other. The papers are folded by the tongues at an angle of about 45 against the sweetmeat and against the oblique segments 93. The tongues, which are attached to a slide, receive a reciprocating motion from a cam 94 by means of a gliding roller 95 and a double lever 97, mounted upon a shaft 96. The forked other end of the lever engages a roller 100, mounted upon a device 99, movable in a guide 98. The reciprocating motion of the device 99 is transferred to the two arms, which are turnable in the device 99 and to the slides of the tongues 92, which will thus get a corresponding motion. A spring 101, one end of which is attached to the other arm of the lever 97 and the other end to the bench 1, presses the gliding roller 95 against the cam. There is a similar device on both sides of the wrapping wheel, the two devices cooperating with the two folding arrangements described as the specification proceeds. At the moment when the tongues 92 are pushed out, the folding plates 102 and 103 come forth striking the tips in by pressing them against the segments. The folding plates 102 and 103 get their motion from the cam 86 by means of arms 104 and 105, the arm 87 and the gliding roller 88. The folding plate 102 (Figs. 1 and 9) is parallel with the oblique segment 93 and turnable on a pin 106. The folding plate 103 (Figs. 1, 9 and 10) moves back and forth in its guide, shaped as a circle-segment and is parallel with the oblique segment 93. lhe motion of the folding plates 102 and 1.03 and the plate 83 is simultaneous, being determined by the position of the roller 88 on the cam 86. The plate 83 operates at an earlier phase of the procession, the following plates 102 and 103 operating in the same phase and co-operating with the tongues governed by the roller on the cam 94. The cams 86 and 94 are mounted on the same shaft 115, the angular velocity of the two cams thus being equal. The sweetmeat moves further on, the ends of it passing between springing and twisted folding plates 108 and between twisted segments 109, which compress and straighten out the folded ends (see Fig. 11, on which the sweetmeat is shown dotted). The segments 93, guides 107, the support of the pins 106, the folding plates 108 and the twisted segments 109 are fixed in respect to each other and mounted upon stays 110, attached to the frame 52, there being one pair of stays on each side of the wrapping wheel.

The wrapping of the sweetmeat is completed in the position 9 where it is removed from the machine. Here the cam 75, cooperating by the spring 79, opens the gripper (3 and the slide 77 e ects the sweetmeat.

The driving mechanisms of the machine are shown in Fig. 2. The driving power is transmitted to the machine from a shaft 111. A gear 112 on this shaft sets another gear 113 in rotation, which in turn transfers the motion over a gear 114 to a shaft 115, on which the cams 86 and 94, putting the folding mechanism in action, are mounted. The gear 112 is engaged by still another gear 116, which is attached to a sleeve enclosing the shaft and from which gear the intermediate wheel 9 gets its motion. The gear 116 drives the carrier wheel 5 by means of a gear 117 and the shaft 54 of the transporting device by means of a gear 118, which in turn is engaged by an intermediate gear 119. The gear 119 drives by means of a gear 120 the shaft 28 of the shearing device and by means of a gear 121 the shaft 46 of the cam 47. The bearings of the gear shafts are in the frame 52. The number of revolutions per minute of the wheel 5 and the intermediate wheel 9 are equal. The transporting device 55 has three times higher speed. The number of revolutions per minute of the cam shafts 111, 115 and 46 is six times the number of revolutions of the carrier wheel 5. In order to secure to the grippers 10 and 73 a speed which is sufficient to transfer the sweetmeat, the corresponding cams have a back and forth motion, the direction of motion when the transfer takes place being opposite to the direction of motion of the corresponding intermediate and wrapping wheels. This motion is effected in the following way: The cams 18 and 22 are rigidly attached to the shaft of the intermediate wheel 9; the shaft being on one side of the frame 52 furnished with a crank 122. The cam is attached to the shaft of the wrapping wheel 72, the shaft being .furnished with a crank 123. The pins of the cranks are interconnected with a rod 124, carrying the shaft 125 of a roller engaged by the forked end of a lever 126, pivoted on the bench 1. The lever gets a swinging motion from a cam 127, attached to the shaft 111, a gliding roller 128 moving on the periphery of the ca m. The wrapping wheel gets its intermittent motion by means of a ratchet 129. The ratchet is, as well' as the wrapping wheel. mounted on a sleeve enclosing the shaft, and is driven by latch 130, mounted on a pin 132, carried by a turn-plate 131 turnable on a shaft. On the same pin is pivoted one end of a lever 133, the other end of which is turnably attached to a lever 136, the latter in turn being mounted on the shaft 111 and receiving an oscillating motion by means of 'a gliding roller 135, rolling upon the cam'134 on a shaft 115.

As the description of the invention suggests, the machine is not intended for wrapping of sweetmeats solely, but of other articles as well. a

I claim: a

1. A machine for wrapping articles comprising a carrier adapted to retain the articles thereupon, means for supplying a wrapper to each article, means for supply ing a label to each article and upon the wrapper applied thereto, means for retaining the labels and wrappers upon the articles, means, for removing the articles with their labels and wrappers thereon from said carrier and means for aflixingv said wrappers about said articles and labels.

2. A machine for wrapping articles comprising a carrier adapted to retain the articles thereupon, means for supplying a wrapper to each article upon said carrier, a label holding magazine, a. rotary transporter for conveying the labels from said magazine to the articles upon said carier and means for affixing said wrappers about said articles and labels applied thereto.

' 3. A machine for wrapping articles comprising a carrier adapted to retain the articles thereupon, means for supplying a wrapper to each article upon said carrier, a label holding magazine, a rotary member for conveying the labels from said magazine to the articles upon the carrier, means for creating a vacuum within the rotary member whereby the labels will be retained thereupon while being conveyed from said magazine to the articles upon thecarrier and means for folding the wrappers about the articles and labels applied thereto. I

4. A machine for wrapping articles comprising a rotary carrier adapted to retain the articles thereupon, means for supplying a label and wrapper to each article, upon said carrier, a spring actuated roller mounted upon said carrier for each article retained thereupon, claws formed with each roller for retaining the labels and wrappers upon the articles, means for removing the articles from said carrier, means for releasing said claws while the articles are being removed from the carrier and means for folding the wrappers about the articles and labels carried thereby.

5. A machine for wrapping articles comprising a frame, a rotary member mounted within said frame, means carried by said rotary member for automatically, gripping the articles to retain the said article thereupon, means for automatically supplying labels and wrappers to the articles retained upon said rotary member, means for automatically folding the wrappers about the articles and labels carried thereby and means mounted within said frame for automatically removing the articles from said rotary member and transferring the same to said folding means.

6. In a wrapping machine, a wrapping wheel, a gripper carried by said wheel, a plurality of pins for attaching the gripper onto said wheel, a radially movable slide co-operating with said gripper, and a spring for pulling said slide outwardly.

7. In a wrapping machine, a segment for compressing the ends of the Wrapper, said segment being adapted to lie under the ends of the wrapper and oblique downwardly, and a pair of crossing tongues'cooperating with said segment.

In Witness whereof I have hereunto set my hand.

KARL FRITTIOF KRONQVIST. 

